28089547 has 2 divisors, whose sum is σ = 28089548. Its totient is φ = 28089546.

The previous prime is 28089539. The next prime is 28089553. The reversal of 28089547 is 74598082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28089547 - 2³ = 28089539 is a prime.

It is not a weakly prime, because it can be changed into another prime (28089527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14044773 + 14044774.

It is an arithmetic number, because the mean of its divisors is an integer number (14044774).

Almost surely, 2^28089547 is an apocalyptic number.

28089547 is a deficient number, since it is larger than the sum of its proper divisors (1).

28089547 is an equidigital number, since it uses as much as digits as its factorization.

28089547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 28089547 is about 5299.9572639786. The cubic root of 28089547 is about 303.9822639410.

The spelling of 28089547 in words is "twenty-eight million, eighty-nine thousand, five hundred forty-seven".